Here at Bison Frames we specialise in the manufacture of quality Windows, Doors & Conservatories. All available with high security hardware options. With over 50 years of fabrication and installation experience we offer you quality and service second to none. Combine this with value for money and reliable deliveries, Bison guarantees customer satisfaction every time. Our products are available in white, oak, oak on white, rosewood, rosewood on white and our new cream-grain and white-grain foil finishes. In addition to our standard range of colours we also have over 40 additional foil colours to choose from in our Spectrum range.